Diagnostic imaging in which ultrasound is used to image an internal body structure or a developing fetus.
An imaging technique that uses high frequency sound waves to visualize underwater surfaces, boundaries, objects, and currents. In both senses also called echography.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.